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A trifluoromethyl-grafted ultra-stable fluorescent covalent organic framework for adsorption and detection of pesticides
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-11-09 , DOI: 10.1039/d0ta07708a Yuxiang Zhao 1, 2, 3, 4 , Zhuyin Sui 4, 5, 6, 7 , Zhaosen Chang 1, 2, 3, 4 , Shunli Wang 1, 2, 3, 4 , Ying Liang 1, 2, 3, 4 , Xin Liu 1, 2, 3, 4 , Lijuan Feng 4, 8, 9, 10 , Qi Chen 1, 2, 3, 4 , Ning Wang 1, 2, 3, 4
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-11-09 , DOI: 10.1039/d0ta07708a Yuxiang Zhao 1, 2, 3, 4 , Zhuyin Sui 4, 5, 6, 7 , Zhaosen Chang 1, 2, 3, 4 , Shunli Wang 1, 2, 3, 4 , Ying Liang 1, 2, 3, 4 , Xin Liu 1, 2, 3, 4 , Lijuan Feng 4, 8, 9, 10 , Qi Chen 1, 2, 3, 4 , Ning Wang 1, 2, 3, 4
Affiliation
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A fluorine-rich covalent organic framework, COF-(CF3)2, was designed and prepared by post-functionalization via the Povarov reaction in a flask in order to take up fluorinated pesticides. Compared with those obtained by a synthetic method performed in a Pyrex tube, the as-prepared COFs in our process not only possess higher specific surface areas, but also can be obtained on a large scale. It's worth noting that COF-(CF3)2 exhibits strong chemical stability even in KMnO4 or NaBH4 solutions, which is highly beneficial for its practical applications. Considering the strong and selective fluorine–fluorine interactions, COF-(CF3)2 was used for the uptake of fluorinated pesticides and showed higher adsorption capacities for trifluralin (151 mg g−1) and fipronil (171 mg g−1). We also found unexpectedly that COF-(CF3)2 possesses strong fluorescence due to the enhanced conjugated system via cycloaddition functionalization. This unique property can be applied in detecting trifluralin through fluorescence quenching induced by their interaction.
中文翻译：
三氟甲基接枝的超稳定荧光共价有机骨架，用于农药的吸附和检测
设计并通过烧瓶中的Povarov反应通过后官能化来设计和制备富氟共价有机骨架COF-（CF 3）2，以便吸收氟化农药。与在耐热玻璃管中通过合成方法获得的那些相比，我们方法中制备的COF不仅具有更高的比表面积，而且可以大规模获得。值得注意的是，即使在KMnO 4或NaBH 4溶液中，COF-（CF 3）2也表现出很强的化学稳定性，这对其实际应用非常有利。考虑到氟与氟的强选择性相互作用，COF-（CF 3）2用于摄取氟化农药，对氟乐灵（151 mg g -1）和氟虫腈（171 mg g -1）的吸附能力更高。我们还出乎意料地发现，由于通过环加成功能化的增强的共轭体系，COF-（CF 3） 2具有强荧光。这种独特的特性可用于通过三氟乐灵的相互作用诱导的荧光猝灭来检测三氟乐灵。
更新日期：2020-11-19
中文翻译：
三氟甲基接枝的超稳定荧光共价有机骨架，用于农药的吸附和检测
设计并通过烧瓶中的Povarov反应通过后官能化来设计和制备富氟共价有机骨架COF-（CF 3）2，以便吸收氟化农药。与在耐热玻璃管中通过合成方法获得的那些相比，我们方法中制备的COF不仅具有更高的比表面积，而且可以大规模获得。值得注意的是，即使在KMnO 4或NaBH 4溶液中，COF-（CF 3）2也表现出很强的化学稳定性，这对其实际应用非常有利。考虑到氟与氟的强选择性相互作用，COF-（CF 3）2用于摄取氟化农药，对氟乐灵（151 mg g -1）和氟虫腈（171 mg g -1）的吸附能力更高。我们还出乎意料地发现，由于通过环加成功能化的增强的共轭体系，COF-（CF 3） 2具有强荧光。这种独特的特性可用于通过三氟乐灵的相互作用诱导的荧光猝灭来检测三氟乐灵。
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